Stoicism — the philosophical tradition founded in Athens around 300 BCE — has experienced a significant revival in recent decades, finding new audiences through books like Ryan Holiday's The Obstacle Is the Way and Marcus Aurelius's Meditations. The reason is practical: Stoic philosophy is not primarily metaphysical. It is a set of mental practices designed to build equanimity, resilience, and clear judgment under adversity.
These seven quotes capture ideas that recur in contemporary coaching — often without attribution to their Stoic origins. Understanding the source makes the idea more resonant and provides a richer intellectual framework for the work.
1. “You have power over your mind — not outside events. Realize this, and you will find strength.” — Marcus Aurelius
This is the central Stoic insight, and it maps directly onto what is now called the locus of control in psychology. What we can control (our thoughts, interpretations, responses) and what we cannot (other people, outcomes, circumstances) is the fundamental distinction in both Stoic practice and evidence-based coaching. Clients who try to control the uncontrollable generate anxiety and wasted effort. Redirecting that energy to the controllable is transformative.
Coaching application: When a client is stuck in frustration about what others are doing or what circumstances allow, ask: "What part of this is within your control?" then redirect attention entirely there.
2. “It is not things that disturb us, but our opinions about things.” — Epictetus
Modern cognitive behavioral therapy is, in significant ways, applied Epictetus. The CBT framework — that events are interpreted through beliefs, and that beliefs (not events) determine emotional response — is precisely what Epictetus taught in the first century CE. The implication is that changing how you interpret an event can change your experience of it, without requiring the event itself to change.
Coaching application: For clients stuck in a fixed interpretation of a situation ("This failure means I'm not capable"), ask: "What other interpretation of this situation is equally possible?"
3. “Waste no more time arguing about what a good man should be. Be one.” — Marcus Aurelius
The gap between knowing and doing is the central challenge of behavioral change. Most people already know, in broad terms, what they should do. The coaching problem is rarely information; it is action. This quote identifies the trap of abstraction — endless analysis, planning, and discussion as a substitute for behavior change.
Coaching application: When a client is overanalyzing, ask: "If you already knew everything you needed to know to take the first step, what would that step be?" Then focus on commitment, not more analysis.
4. “The impediment to action advances action. What stands in the way becomes the way.” — Marcus Aurelius
This is Ryan Holiday's thesis in The Obstacle Is the Way — and it reflects the Stoic practice of seeing obstacles as the specific thing you were meant to work through, not an interruption to your path. In coaching, this reframe can be genuinely transformative for clients who experience obstacles as evidence that they are on the wrong track.
Coaching application: For clients who see difficulty as a signal to stop, ask: "What if this obstacle is specifically where the growth is?"
5. “He who fears death will never do anything worthy of a man who is alive.” — Seneca
Seneca's writing on mortality as a clarifying force maps onto the coaching practice of mortality reflection — using awareness of finite time to clarify priorities and reduce trivial concerns. Fear of failure, social judgment, and risk often shrinks when placed beside the larger question of how you want to have lived.
Coaching application: "At the end of your life, looking back, what would you wish you had been willing to risk that you currently aren't?"
6. “Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.” — Marcus Aurelius
Anticipatory anxiety — worry about future events that have not yet occurred — is one of the most common sources of suffering and one of the most addressable in coaching. This quote offers the Stoic corrective: you don't need to solve future problems now. You need to function now, with the resources you currently have.
Coaching application: For catastrophizing clients, ask: "What do you actually need to do today, with the information you actually have today?"
7. “Seek not that the things which happen should happen as you wish; but wish the things which happen to be as they are, and you will have a tranquil flow of life.” — Epictetus
This is perhaps the hardest Stoic teaching for modern audiences, because it sounds like resignation. It is not. It is the distinction between acceptance and passivity. You can take full action toward a goal while simultaneously accepting that the outcome is not entirely within your control. This combination — full effort plus acceptance of the outcome — is the productive posture, and it is what most of us struggle to hold simultaneously.
Coaching application: For clients agonizing over outcomes they can't control, separate the question: "What's the maximum effort you're willing to put in? Good — commit to that. Now separate that commitment from the outcome, which is not yours to guarantee."
Frequently Asked Questions
Is Stoicism compatible with modern psychology?
Significantly, yes. Cognitive behavioral therapy, acceptance and commitment therapy (ACT), and rational emotive behavior therapy (REBT) all share Stoic foundations. The overlap is not coincidental — Albert Ellis, who developed REBT, explicitly credited Epictetus as an influence. Modern psychological research has validated many of the mechanisms that Stoic practices target.
Does Stoicism mean suppressing emotions?
No — this is the most common misunderstanding of Stoicism. Stoics were not emotionally flat; Marcus Aurelius's Meditations is full of genuine feeling. The Stoic practice is not suppression but non-attachment — experiencing emotion without being controlled by it, and not generating additional suffering through mental elaboration of negative events.